1.Reboot Device
Most computer systems store up data on their memory to provide people with better performance. Although, if you have been running your device for some time now. Then these files might have piled up on the memory. The only way to delete all of these is by giving your device a rest. This is why without getting into any technical fixes, you should start by rebooting your system.
This should give the device enough time to clear up its memory by deleting all of the cache files. Another thing to keep in mind is that you keep your system switched off for a few minutes before starting it up again. Your problem should most likely be gone after your computer boots back up.
2.Remove Network from Preferred List
If you are still getting the same problem then your current network connection might be selected as the preferred one. This can make it hard for users to connect with the connection because the system might be trying to establish a connection automatically. You can remove this from the list to prevent this issue. Start by going to your ‘system preferences’ from the network tab.
You can then proceed to open up the ‘network preferences’ from here. Finally, click on ‘advanced’ to view a complete list of all the networks you have connected to before. Remove your current connection from here and try to connect again. You should delete all the other networks that you do not use anymore from here as well. This will help in preventing the error from occurring again. If the problem persists then a reboot might be required after the deletion of a network.